Re: SPARK PROBLEMS, I dare you to explain this one!
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Posted by JR2 on June 23, 1998 at 08:56:01:
In Reply to: SPARK PROBLEMS, I dare you to explain this one! posted by Joe Brown on June 20, 1998 at 18:45:06:
: Farmall Cub 48. New coil in mag,condenser, points,cap,rotor,wires,plugs and carb, timed on the money. This thing just keeps running rough. I pulled the wire from the coil while it was running to look at the spark. If I pull the wire out till I have a 1/2" spark jumping from the coil to the wire the engine runs smooth as silk. If I move the wire into the coil and make connection it runs rough again. I tried widening the spark gap but this didn't help. I've been told I need to add a resistor on my plugs. Can anyone back this up and or explain to me whats happening. Thanks in advance. Joe, looks like you've gotten more than enough responses from theory to about anything else. I can not prove or disprove the various theory put forth by some of the posts. However, from a practical, out there at the grassroots type situation, I can tell you for sure that when you hold that wire away from its contact the spark is hotter. I have even seen mechanics cut the wire inside the insulation and create a gap in wires to make an engine run better because of the hotter spark. I have seen many engines run better when a wire is held away from its contact point as you describe. It's pretty commonly known. Have a good day. John
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